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Sets the URL to a server-side script that returns the data for a database-driven grid. The server-side logic can be written with Profound UI's Universal Displays or any other web development framework. The script will receive parameters "start" and "limit" in the HTTP POST data to, which tell which records in the set are to be returned. The script is called repeatedly as the user scrolls through the gird grid so that only one page of records is returned by the server at one time. The output is a record set in JSON format, see the examples below. On the first request to the server-side script an additional parameter "getTotal=1" is passed. When this is present, the script must return the total number of records in the set using the "totalRecs" property in the output.